Firearm



D. s, 1931. E, MCCOY 1,835,715

FIREARM Filed March 14, 1929 3 Sheets-Sheet l 3fm/vanto@ E, McCOY 1,835.715'

FIREARM Filed arch 14, 1929 5 ShetSSh86t 2 De@ s, 1931.

x/ l ///7/////// t .buf MM. .Wh N95 KI, www@ Patented Dec. 8, 1931 UNITED; isrArEs .PATENT :OFFICE j I A l' I "i or nEERLoDGnMoNTANA l i l 1 11':enfilent' v l p i f appua'tion filed Mercalli, 192e. "seriai No. 347,049. Q

This invention-relates--to vnew and useful nected the grip frame 11, and ithe'barrel 12. improvements in iirearms,"and particularly The upper part ofthe framev is/'open `to-irearms of thepistol type. i 'Y throughout its entire length,and inthein- 5 One object of thepre's'ent invention is'to vner faces lof the side wallsof said upper part providea' firearm which is' of'simple fconare formed the longitudinal ribs and grooves y"55 struction,` andiwhich 'is vformedv of the mini- 13 and 141, with which are engaged the grooves mumr number of parts;l 1 and ribs 15 and16, of the slidable lbreach Another Objectis 'tot provide' airearm of block 17. Secured within the' reare'nd ofthe 'this character I'wherein the magazine is so frame '10 is the stop block18,against which- '1" located lthat it may beea'si'ly'and quickly rethe breech block strikes, upon reaching the Ji60 4moved and rep-laced. 1 Yrearward limit ofits recoil movement, 'as will Another object is to provide `an automatic 'be explained later herein. Carried-bythe rear pistol which has thegeneral contour vofthe end'of the breechblockis acover pl'ate19, ordinary revolver, whereby to render the which, when the said'block isin its normal l" same more easily handled than the ordinary .forward position, coversthe upper 'open side "65 form of automatic pistols. ofthe frame 10. In 'the lowerfrear portion Another obfect is to provide a novel and ofthe framey 11 there is pivotal'ly'connected Vimproved form of sear,:and a novel formV of the lower end of the upwardly and'forwardly safety' device, for engaging Said Sear, said Curved-tubular membe1.20,*withiH lWhiohis Si safety deviceV being so arranged that it is "disposed the recoil spring 21. Carriedbythe v"70 'automatically released upon grasping the 'upper end of the spring 21 is aca-p member grip of the pistol. i 22 vwhich is urged against the transverse Apin Other objects and advantages will be ap- 23, in the upperend of theltube, bythefor'c'e parent from the following description when of `said spring. Pivotally connected-to each taken in Connection with the accompanying Side Of'llle bIeGCl'l blOCl iS'aIl arnigdr'wllich rv75 drawings, has the same longitudinal curvatureas the In thedrawings: v member20, and` has its other end disposedl in Figure 1 is a top plan View of an automatic said member, bearing on the upper` surfacelof pistol made in accordance with the present the said cap22. When the breech block moves ilwentimQu rearwardly these arms 24 are driveninto the *80 Figure 2 isa vertical longitudinal central tubular member 20, whereby to compress the sectional view on the line 2 2 of Figure 1. spring 21, which spring expands, vwhen the Figur-e 3 isla vertical transverse sectional breech block reaches the stop member/or view on the line 8 3 of Figure'2. block 18, whereby to projectthe breech block Figure 4 is a 'view similar to Figure 2, forward into its normalpositionagain'stfthe85 showing the parts in the position of the breech 25. lVithin theframe 10,y just below recoil. the breech block, is a" chamber or cavity 2 6,

Figure 5 is a transverse sectional View on within which is removably disposed the carthe line 5 5 o-f Figure 2. tridge containing box'magazine 27?, said boi;

i Figure 6 is a-transverse sectional View on magazine/containing two vertical rows of lcar-l 90 i of'. the pistol to which isdetachably convided vwith a spring pressed latc1i32,`-which the line 6 6 of Figure 2. tridges 28, urged upwardly by the spring Figure7 isa-vertical longitudinalsectional pressed plate 29, within the box magazine detail view through the breech block. case. Secured to the lower faceofthe frame Figure 8 is a horizontal sectional detail 10, adjacent its rear portion, isthe rearipart View on the line 8 8 o f Figure 2. 30 of the trigger guard, and pivotally con-95 Figure V9is a front elevation of the breech nected to the lower end ofsaid/partBO is the block removedv from the firearm. Y forward part 31, of thevguard'fsaid forward Referring particularlytothe accompanyportion bearing against the lowerfface ofthe ing drawings,= 10 represents the main frame front-part of the frame 10,-and beingproengages with a keeper 33, on the front face of the said frame, below the rear end of the barrel 12. Mounted in the central portion of the frame 10, between the curved recoil arms 24, is a block 34, said block being bifurcated in its rear portion and having a transverse ledge 35, in the bottom of said bifurcation. Extending transversely of the bifurcation are two vertically alined pins 36 and E37, and pivotally mounted on the lower pin 37, by means of the slot 3S, is the sear 39, a coil spring 40 being disposed between the intermediate portion of the sear and for engagement of its hook 41, in the notch 42, of the outer end ofthe hammer 43. The upward n'iovement of the sear is limited by contact with the upper pin 36. T he hammer is pivotally mounted in the upper end of the forward portion of the block 34, by means of the pin 44, carried transversely by said block. In the breecl block 17 is mounted thc spring pressed firing pin 45.

Pivotally mounted in the lower portion of the front of the grip frame'll the lower end of an upwardly and forwardly lcurving safety arm 4G, the upper end of which is arranged to be engaged beneath the outer end of the sear 39'to hold the same against release from the hammer, said arm being normally urged into such position by means of the spring 47.. It will be noted that the forward edge of the safety 'arm 46 projects through a slot in the forward portion of the grip 'frame 11, so that when the hand which .grasps the said grip may push the arm inwardly, to disengage its upper end from beneath the scar, upon ya slight squeeze given thereto. Y v

The forward end of the lower edgel of the sear 39 is formed with ar downwardly projecting point 48, with 'which is engaged the upper pointed end 49, of the upper portion 50, of the trigger 51, said trigger being pivotally mounted in the lower portion of the frame 10, and projecting down within 'the trigger gua-rd, as clearly seen in the drawings. The portion- 50, of the trigger, which extends upwardly into the frame 10, has its point arranged for Iengagement with the point 4S, of the scar, for 'the purpose of releasing said sear from the hammer, when the lower portion of the trigger is pulled rearwardly, as vwill be readily understood, `from an inspection of the drawings. spring 54, -located between the rear of the trigger 51, and the rear'portion ofthe trigger guard resiliently urges the trigger into the position shown in Figure B, whereby `its upper end Vor nose 4S) enga-ges behi-nd the point 48 of the scar, so that upon pulling rearwardly upon the lower portion of the trigger, the sear willbe released from the hammer.

In the forward portion of the Yupper face "i of the lbreech block 17, there is formed Va the said ledge" 35, for normally urging the scar upwardly longitudinal groove 54, the forward end of which opens through the forward end of the block. Pivotally mounted in said groove is the longer arm of an L-shaped member 55, the shorter arm of which depends on the forward face of the block. A spring 56, within the groove 54, bearing against the bottom thereof, and against theV lower face of the rear end of said longer arm of the L-shaped member 55, to normally rock said member so that the lower end of the depending arm thereof engages in the circumferential groove 57, of the rear end of the cartridge 58, while said cartridge is within the chamber of the firearm. `Formed inthe forward face of the breech block 17, below the forward end of the member 55, and at one side of the center of said face, is a recess 59, and arranged in said recess is a spring pressed ejector pin 60, said pin being held in limited sliding movement by the transverse pin engaged in the longitudinal recess 62, in the pin 60, said transverse pin being indicated by the numeral Gl. Villen the breech block is driven rearwardly by the recoil, the lower end of the depending arm of the member 55, which engages `in tue groove ofthe cartridge, holds the empty shell, whilethe spring `pressed pin 6() exerts a forward pressure on the lower portion of the rear end of the shell, so that the instant the forward end of the empty shell is free of the chamber of they firearm,

' such shell will be ejected upwardly and laterally through the opening in the uv per side 'of the frame 10. As the breech lock 17 moi/'es'rearwardly it engages the hammer and moves the same rearwardly and downwardly on its pivot, against the tension of its Spring 63., so that the hook 41, of the :seal-A39 may engage in the notch 42, t0 Vhold the hammer in cocked position. At the same time, the arms :24 are driven into the member 20, whereby to compress the spring 21, which Aquickly expands, when the vbreech block strikes the stop block 18, so that the breech block is projected forwardly again. When the block 1'7 strikes the block A18 the ejector throws out the empty shell, whereupon the .spring pressed plate 29 urges a fresh cartridge up into the breech, in `position to vbe driven into the ychamber of the firearm, when the block again comes forward. As the trigger is 1returned to its normal position, by thespring 54, the end 49 thereof engages with the point of the sear and moves the .latter rearwardly swung down, so that the empty box may be quickly withdrawn and a newclip inserted.

Cover plates 64 are secured to opposite sides of the grip frame l1, by means of the transverse screw 65.

l/Vhat is claimed is:

1. An automatic firearm of the pistol type including an action containing portion having a cartridge box receiving chamber in advance of the action, a barrel, a grip portion, and a trigger guard for holding the box in said chamber.

2. An automatic firearm of the pistol type including a frame having a space for the action of the firearm and a space for the cartridge box, and a movable trigger guard for holding the box in said space.

3. An automatic firearm of the pistol type including a frame containing the action of the firearm, a grip connected with the frame, a slidable breech block in the frame, a cylinder movably supported in the grip and having a spring therein, the upper end ofthe cylinder being open, a stop member in the open end of the cylinder, a follower in the cylinder held against the stop member by said spring, and arms connected With the breechblock and engaged With the said follower.

4. An automatic firearm of the pistol type including a frame containing the action Vof the firearm, a grip connected with the frame, a slidable breech block in the frame, a longitudinally extending curved cylinder in thev grip having its lower end pivotally connected thereto, a coil spring in the cylinder, a transverse stop pin in the upper end of the cylinder, a follower on the upper end of the spring and held against the pin thereby, and longitudinally curved arms pivotally connected with the breech block and having their other ends bearing on said follower on opposite sides of said stop pin.

In testimony whereof, I affix my signature.

EARL MCCOY. 

